./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:30:07,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:30:07,867 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:30:07,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:30:07,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:30:07,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:30:07,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:30:07,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:30:07,898 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:30:07,900 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:30:07,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:30:07,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:30:07,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:30:07,905 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:30:07,905 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:30:07,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:30:07,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:30:07,906 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:30:07,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:30:07,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:30:07,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:30:07,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:30:07,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:30:07,907 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:30:07,907 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:30:07,908 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:30:07,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:30:07,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:30:07,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:30:07,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:30:07,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:30:07,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:30:07,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:30:07,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:30:07,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:30:07,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:30:07,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:30:07,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:30:07,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:30:07,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:30:07,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:30:07,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:30:07,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:30:07,912 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:30:08,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:30:08,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:30:08,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:30:08,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:30:08,113 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:30:08,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2024-02-20 11:30:09,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:30:09,392 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:30:09,410 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2024-02-20 11:30:09,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0958e90ed/3edcb75b8f2d4d0e85be7e51122f5f95/FLAG55b5e4e96 [2024-02-20 11:30:09,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0958e90ed/3edcb75b8f2d4d0e85be7e51122f5f95 [2024-02-20 11:30:09,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:30:09,434 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:30:09,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:30:09,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:30:09,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:30:09,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571a358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09, skipping insertion in model container [2024-02-20 11:30:09,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,484 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:30:09,726 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2024-02-20 11:30:09,738 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:30:09,749 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:30:09,786 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2024-02-20 11:30:09,792 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:30:09,830 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:30:09,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09 WrapperNode [2024-02-20 11:30:09,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:30:09,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:30:09,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:30:09,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:30:09,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,878 INFO L138 Inliner]: procedures = 175, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 74 [2024-02-20 11:30:09,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:30:09,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:30:09,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:30:09,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:30:09,888 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,902 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,919 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-02-20 11:30:09,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:30:09,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:30:09,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:30:09,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:30:09,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (1/1) ... [2024-02-20 11:30:09,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:30:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:30:09,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 11:30:10,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 11:30:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-20 11:30:10,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-20 11:30:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:30:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:30:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 11:30:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:30:10,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:30:10,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:30:10,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:30:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:30:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 11:30:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:30:10,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:30:10,070 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:30:10,210 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:30:10,212 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:30:10,373 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:30:10,373 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:30:10,451 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:30:10,456 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:30:10,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:30:10 BoogieIcfgContainer [2024-02-20 11:30:10,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:30:10,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:30:10,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:30:10,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:30:10,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:30:09" (1/3) ... [2024-02-20 11:30:10,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773325de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:30:10, skipping insertion in model container [2024-02-20 11:30:10,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:30:09" (2/3) ... [2024-02-20 11:30:10,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773325de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:30:10, skipping insertion in model container [2024-02-20 11:30:10,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:30:10" (3/3) ... [2024-02-20 11:30:10,467 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2024-02-20 11:30:10,482 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:30:10,483 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:30:10,483 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:30:10,517 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:30:10,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 19 transitions, 42 flow [2024-02-20 11:30:10,566 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-02-20 11:30:10,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:30:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 21 events. 2/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2024-02-20 11:30:10,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 19 transitions, 42 flow [2024-02-20 11:30:10,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 19 transitions, 42 flow [2024-02-20 11:30:10,587 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:30:10,594 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@df905f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:30:10,594 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:30:10,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:30:10,603 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-20 11:30:10,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:30:10,603 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:10,604 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-20 11:30:10,605 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:30:10,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 226098340, now seen corresponding path program 1 times [2024-02-20 11:30:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:10,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781298873] [2024-02-20 11:30:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:10,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:10,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781298873] [2024-02-20 11:30:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781298873] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:10,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-20 11:30:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294602974] [2024-02-20 11:30:10,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:10,941 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:30:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:30:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:30:10,977 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-20 11:30:10,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:10,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:10,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-20 11:30:10,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:30:11,028 INFO L124 PetriNetUnfolderBase]: 21/58 cut-off events. [2024-02-20 11:30:11,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:30:11,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 58 events. 21/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 12 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 100. Up to 35 conditions per place. [2024-02-20 11:30:11,030 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 13 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-02-20 11:30:11,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 18 transitions, 70 flow [2024-02-20 11:30:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:30:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:30:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-02-20 11:30:11,041 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2024-02-20 11:30:11,045 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2024-02-20 11:30:11,045 INFO L507 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 70 flow [2024-02-20 11:30:11,046 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:11,046 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:11,046 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-20 11:30:11,046 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:30:11,047 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:30:11,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1580900491, now seen corresponding path program 1 times [2024-02-20 11:30:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:11,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633256826] [2024-02-20 11:30:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:11,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:30:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:11,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:30:11,130 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:30:11,131 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-20 11:30:11,133 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-20 11:30:11,133 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-20 11:30:11,134 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:30:11,134 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:30:11,136 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:30:11,136 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-20 11:30:11,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:30:11,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 76 flow [2024-02-20 11:30:11,168 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-02-20 11:30:11,168 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:30:11,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 68 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-02-20 11:30:11,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 76 flow [2024-02-20 11:30:11,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 33 transitions, 76 flow [2024-02-20 11:30:11,170 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:30:11,171 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@df905f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:30:11,171 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 11:30:11,179 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:30:11,180 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-20 11:30:11,180 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:30:11,180 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:11,180 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-20 11:30:11,181 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:30:11,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 257603314, now seen corresponding path program 1 times [2024-02-20 11:30:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124536469] [2024-02-20 11:30:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:11,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124536469] [2024-02-20 11:30:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124536469] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:11,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-20 11:30:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811352094] [2024-02-20 11:30:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:11,227 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:30:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:30:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:30:11,231 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-02-20 11:30:11,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:11,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:11,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-02-20 11:30:11,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:30:11,416 INFO L124 PetriNetUnfolderBase]: 525/911 cut-off events. [2024-02-20 11:30:11,421 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-20 11:30:11,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1789 conditions, 911 events. 525/911 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3647 event pairs, 252 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1262. Up to 451 conditions per place. [2024-02-20 11:30:11,434 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 39 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-02-20 11:30:11,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 193 flow [2024-02-20 11:30:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:30:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:30:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-02-20 11:30:11,442 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2024-02-20 11:30:11,443 INFO L308 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-02-20 11:30:11,443 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 47 transitions, 193 flow [2024-02-20 11:30:11,443 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:11,443 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:11,444 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-20 11:30:11,444 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:30:11,444 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:30:11,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1276023473, now seen corresponding path program 1 times [2024-02-20 11:30:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468498295] [2024-02-20 11:30:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:11,473 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:30:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:11,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:30:11,490 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:30:11,491 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-20 11:30:11,491 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-20 11:30:11,491 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-20 11:30:11,491 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-20 11:30:11,491 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:30:11,492 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:30:11,492 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:30:11,492 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-20 11:30:11,522 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:30:11,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 112 flow [2024-02-20 11:30:11,539 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-02-20 11:30:11,539 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:30:11,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 6/55 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2024-02-20 11:30:11,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 112 flow [2024-02-20 11:30:11,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 47 transitions, 112 flow [2024-02-20 11:30:11,544 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:30:11,545 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@df905f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:30:11,545 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:30:11,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:30:11,547 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-20 11:30:11,547 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:30:11,547 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:11,547 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-20 11:30:11,547 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:30:11,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash 302468142, now seen corresponding path program 1 times [2024-02-20 11:30:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183023156] [2024-02-20 11:30:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183023156] [2024-02-20 11:30:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183023156] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:11,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-20 11:30:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450466986] [2024-02-20 11:30:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:11,612 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:30:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:30:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:30:11,619 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-02-20 11:30:11,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:11,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:11,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-02-20 11:30:11,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:30:12,587 INFO L124 PetriNetUnfolderBase]: 9048/13148 cut-off events. [2024-02-20 11:30:12,588 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2024-02-20 11:30:12,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26250 conditions, 13148 events. 9048/13148 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 70115 event pairs, 3549 based on Foata normal form. 0/12344 useless extension candidates. Maximal degree in co-relation 6698. Up to 8869 conditions per place. [2024-02-20 11:30:12,674 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 57 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-02-20 11:30:12,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 288 flow [2024-02-20 11:30:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:30:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:30:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-02-20 11:30:12,677 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-02-20 11:30:12,678 INFO L308 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2024-02-20 11:30:12,679 INFO L507 AbstractCegarLoop]: Abstraction has has 49 places, 68 transitions, 288 flow [2024-02-20 11:30:12,679 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:12,679 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:12,679 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-20 11:30:12,679 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:30:12,679 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:30:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 817395668, now seen corresponding path program 1 times [2024-02-20 11:30:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:12,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606920650] [2024-02-20 11:30:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:12,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:30:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:12,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:30:12,727 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:30:12,727 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-20 11:30:12,727 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-20 11:30:12,728 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-20 11:30:12,728 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-20 11:30:12,728 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-20 11:30:12,728 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 11:30:12,728 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:30:12,729 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:30:12,729 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-20 11:30:12,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:30:12,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 61 transitions, 150 flow [2024-02-20 11:30:12,768 INFO L124 PetriNetUnfolderBase]: 8/72 cut-off events. [2024-02-20 11:30:12,768 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:30:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 72 events. 8/72 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 67. Up to 5 conditions per place. [2024-02-20 11:30:12,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 61 transitions, 150 flow [2024-02-20 11:30:12,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 61 transitions, 150 flow [2024-02-20 11:30:12,771 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:30:12,771 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@df905f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:30:12,771 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:30:12,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:30:12,773 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-20 11:30:12,773 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:30:12,773 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:12,773 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-20 11:30:12,773 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:30:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 360693656, now seen corresponding path program 1 times [2024-02-20 11:30:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494629] [2024-02-20 11:30:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:12,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:12,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494629] [2024-02-20 11:30:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494629] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:12,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:12,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-20 11:30:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252867762] [2024-02-20 11:30:12,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:12,794 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:30:12,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:30:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:30:12,812 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 61 [2024-02-20 11:30:12,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:12,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:12,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 61 [2024-02-20 11:30:12,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:30:24,681 INFO L124 PetriNetUnfolderBase]: 138114/182648 cut-off events. [2024-02-20 11:30:24,681 INFO L125 PetriNetUnfolderBase]: For 13073/13073 co-relation queries the response was YES. [2024-02-20 11:30:25,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367995 conditions, 182648 events. 138114/182648 cut-off events. For 13073/13073 co-relation queries the response was YES. Maximal size of possible extension queue 3636. Compared 1116153 event pairs, 45867 based on Foata normal form. 0/170309 useless extension candidates. Maximal degree in co-relation 33284. Up to 145462 conditions per place. [2024-02-20 11:30:26,007 INFO L140 encePairwiseOnDemand]: 47/61 looper letters, 75 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2024-02-20 11:30:26,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 387 flow [2024-02-20 11:30:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:30:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:30:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-02-20 11:30:26,009 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6612021857923497 [2024-02-20 11:30:26,010 INFO L308 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2024-02-20 11:30:26,010 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 89 transitions, 387 flow [2024-02-20 11:30:26,010 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:26,011 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:26,011 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-02-20 11:30:26,011 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 11:30:26,011 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:30:26,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1880193516, now seen corresponding path program 1 times [2024-02-20 11:30:26,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:26,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68460120] [2024-02-20 11:30:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:26,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:30:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:30:26,032 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:30:26,032 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:30:26,032 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-02-20 11:30:26,033 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-02-20 11:30:26,033 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-02-20 11:30:26,033 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-02-20 11:30:26,033 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-02-20 11:30:26,033 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-02-20 11:30:26,033 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-20 11:30:26,034 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:30:26,034 WARN L345 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:30:26,034 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-20 11:30:26,059 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:30:26,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 190 flow [2024-02-20 11:30:26,068 INFO L124 PetriNetUnfolderBase]: 10/89 cut-off events. [2024-02-20 11:30:26,068 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-20 11:30:26,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 89 events. 10/89 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 90. Up to 6 conditions per place. [2024-02-20 11:30:26,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 190 flow [2024-02-20 11:30:26,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 190 flow [2024-02-20 11:30:26,072 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:30:26,074 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@df905f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:30:26,075 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-20 11:30:26,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:30:26,076 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-20 11:30:26,076 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:30:26,076 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:26,076 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-20 11:30:26,077 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-20 11:30:26,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash 432278608, now seen corresponding path program 1 times [2024-02-20 11:30:26,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:26,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965199404] [2024-02-20 11:30:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965199404] [2024-02-20 11:30:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965199404] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:26,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:26,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-20 11:30:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823254095] [2024-02-20 11:30:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:26,105 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:30:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:30:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:30:26,115 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-02-20 11:30:26,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:30:26,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:26,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-02-20 11:30:26,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand